010_分组柱图

import pandas as pd
import matplotlib.pyplot as plt


if __name__ == '__main__':
    students = pd.read_excel("C:/Users/123/Desktop/pandas/010_叠加柱状图_水平柱状图/Students.xlsx")
    print(students.head)

    # 排序 : 倒序
    students.sort_values(by=["2017", "2016"], inplace=True, ascending=False)
    print(students.head)

    # 方法一
    students.plot.bar(x = "Field", y = ["2017", "2016"], color=["orange", "red"], title = "international Students by Field")
    plt.title("International Students by Field", fontsize = 16, fontweight = "bold")    # 设置title
    plt.xlabel("Fieled", fontweight = "bold")    # x轴名称
    plt.ylabel("Number", fontweight = "bold")    # y轴名称

    # 设置文字 - 对齐
    ax = plt.gca()
    ax.set_xticklabels(students['Field'], rotation = 45, ha = "right")

    plt.tight_layout()    # 显示标签完整

    # 显示图片
    plt.show()